Nady Systems WA-120, User Manual

Thank you for purchasing a Nady WA 120 Wireless Portable P.A.—and 
congratulations on your choice. The WA 120 is the most affordable 
and compact of the popular line of Nady wireless P.A.’s. Ideal for 
many applications, including use in classrooms, conference/meeting 
rooms, churches, health clubs and small auditoriums, it is powerful, yet 
lightweight and easily portable. We are sure you will find this versatile 
system a powerful and useful tool for your presentations.

The Nady WA 120 includes a full-range speaker system with built-in 
amplifier, mixer, and high band VHF wireless receiver. Special features 
include:

• Wireless system features noise reduction companding circuitry for 

quietest operation with a wide dynamic range.

• Built-in echo/reverb

• Available with choice of WHT handheld mic or WLT lavalier/headset  

mic bodypack transmitters. One WA 120 wireless P.A. and one    
WHT or WLT Transmitter on the same channel comprise a system.

• Powerful 20W audio output

• 1/4” unbalanced input jacks (1 MIC, 1 AUX) and one 1/4” unbalanced 

RECORD OUT, treble and bass controls

• Powered externally with provided AC adapter, or internally with either 

the optional RB-120 rechargeable battery or 8 “D” Cell alkaline or 
rechargeable batteries

• Convenient internal charging ports for 9V rechargeable transmitter 

batteries (NiCad or Ni-MH) and RB-120 optional rechargeable battery

• Small and lightweight—only 8.3” x 10.6” x 5.4” (211 x 270 x 137mm) 

and 5.3 lbs. (2.4 Kg)

INTRODUCTION

Transmitter Set-up and Operation

• Snap open the 

battery compartment (1)

 and insert a fresh 

9V battery 

(2)

, observing the correct polarity. Close the compartment.

• The WLT is provided with a 

3.5 mm locking jack (3)

 for connecting 

themicrophone. Plug in either the 

Lavalier/Lapel (4)

 or the 

Headworn 

microphone (5)

, as supplied. To secure the connection, turn the metal 

slip ring on the plug clockwise to thread it on to the jack. To unplug, 
reverse the process. Slip the transmitter into a pocket or clip on to your 
clothes. To use the lavalier mic, attach it at chest level. Do not place too 
close to the mouth – a distance of about six inches usually works best. 
To use the headworn mic, place it on the head and adjust the mic boom 
so that the mic is about one inch to the side of the front of the mouth. 

(Note: The lavalier or headworn mic wire is also the transmit antenna, 
and rolling up or shortening the wire may reduce the effective operat-
ing range. Extend the wire fully during use, and keep it as straight as 
possible.)

• Turn on the WLT by sliding the 

OFF/STANDBY/ON SWITCH (6) 

to the 

STANDBY position (transmitter on, audio muted) or the ON position 
(transmitter and audio both on). The 

battery indicator LED (7)

 will give 

a single quick flash, indicating usable battery strength. In the case of a 
dead or low battery, the LED either will not go on at all or will stay on 
continuously, indicating that the battery should be replaced with a fresh 
one.

• The RF ON light on the WA 120 should now be lit.
• Re-position the microphone farther from the source or adjust the 

audio 

input level control (8)

 if the monitored volume is to loud or distorted 

after adjusting the receiver.

• Adjust the volume control of the WA 120 to a comfortable listneing level 

as desired.

[Note: Observe care in selecting volume, transmitter location and
speaker placement so that acoustic feedback (howling and screeching)
will be avoided. Please also observe the pickup patterns of the micro-
phone selected: omnidirectional mics pick up sound equally from all
directions and are prone to feedback if not used carefully. Unidirectional
mics are more resistant to feedback, but pick up sound sources best that
are directly in front of the mic. Also, mics that are farther from the sound
source, such as lavaliers, require more acoustic gain and thus are also
more prone to feedback than close-source mics such as handheld or
headworn mics that are used close to the mouth.]

(Note: Microphone elements can easily be destroyed by the buildup of
salts and minerals from perspiration and saliva. It is good practice to put 
a windscreen on the mic element at all times to protect it.)

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